This is a multicenter,open-label trial to evaluate activity and safety of the investigational intensive in HIV+ patients with Burkitt's lymphoma.

Experimental treatment consists of an induction phase followed by a consolidation or intensified phase according to tumor response.

Until recently, the immuno-compromised state of patients with concomitant HIV/AIDS and BL was thought to limit the ability to administer intensive chemotherapeutic regimens due to infection rate. However, the advent of highly active antiretroviral therapy (HAART) and evidence in diffuse large B-cell lymphomas that HIV-positive patients can tolerate standard chemotherapeutic regimens with improved outcomes have led investigators to treat HIV-positive patients with the same intensive chemotherapy regimens used to treat immuno-competent patients. Data suggest that these current approaches, along with supportive care, may result in improved patient outcomes, similar to those in the immuno-competent patient population.

evaluation of activity of the induction phase in terms of complete remission rate [ Time Frame: at the end of the induction phase of the investigational intensive chemotherapy, an expected average of 45 days ] [ Designated as safety issue: Yes ]

Objective lymphoma response achieved after the induction phase of the experimental treatment.

Secondary Outcome Measures:

Feasibility and tolerability of the investigational intensive chemotherapy in terms of grade ≥4 adverse events [ Time Frame: participants will be followed for the duration of the whole experimental program, an expected average of 100 days ] [ Designated as safety issue: Yes ]

Assessment of incidence of grade 4 AE during experimental treatment (induction, consolidation and intensification phases as well as conditioning and autologous stem cell transplantation (if indicated)

Feasibility and tolerability of the consolidation phase followed by BEAM conditioning and autologous stem cell transplantation in terms of prevalence of grade ≥4 adverse events [ Time Frame: participants will be followed for the duration of the whole experimental program, an expected average of 100 days ] [ Designated as safety issue: Yes ]

Feasibility and tolerability of intensification phase in terms of prevalence of grade ≥4 adverse events [ Time Frame: participants will be followed for the duration of the whole experimental program, an expected average of 100 days ] [ Designated as safety issue: Yes ]

Participants who will not achieve a complete or partial response after induction and consolidation phases will be referred to intensification phase, which will be followed by BEAM + ASCT. These patients will be assess for tolerabbility and AE during these therapeutic phases.

Activity of the whole investigational program in terms of complete remission rate [ Time Frame: at the end of the whole program, an expected average of 100 days ] [ Designated as safety issue: Yes ]

Participants will be assessed by conventional exams to define complete remission rate after the whole experiemntal program; that is after consolidation phase for patients who achieved complete remission after induction phase, after BEAM + ASCt for patients who achieved partial response after induction phase, and after intensification phase for patients who did not achieve an objective response after induction phase.

AraC every 12 hours for four days (dd -5 to -2) supported by reinfusion of CD34+ cells (dd 0), rituximab infusion (dd -1 and +11) and second in-vivo purged PBPC collection (if needed).

Other Name: unresponsive patients, refractory disease

Drug: BEAM conditioning

BCNU on dd 1; VP-16 every 12 hours on dd 2-5 and araC every 12 hours on dd 2-5; melphalan on dd 6, followed by the reinfusion of CD34+ cells

Other Name: Conditioning regimen, autologous transplantation

Radiation: Consolidation radiotherapy

At the end of the whole program, patients will be evaluated for involved-field irradiation with 6-10 MeV photons and a dose of 36 Gy (2 Gy/d, five fractions a week). Three subgroups of patients will be considered for radiotherapy

Other Name: bulky irradiation; residual lesion

Detailed Description:

The activity of feasibility of the proposed program will be assessed in HIV+ patients with Burkitt lymphoma with the aim to improve tolerability, minimize source consuming and supporting treatment and redu ce late sequels. Available combinations in this setting are really source demanding and toxic combinations showing high rates of septic complication and a treatment-related mortality of near 20%.

Severe psychiatric illness or any other clinical, social or psychological condition that could interfere with patient's adherence and compliance

Significant cardiac disease or acute myocardial infarction in the last 12 months

Severe active infection (except for HBV and/or HCV co-infection)

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Please refer to this study by its ClinicalTrials.gov identifier: NCT01516593